* {
  font-family: "微软雅黑";
  font-size: 62.5%;
  margin: 0;
  padding: 0;
}
header {
  width: 100%;
  height: 13vw;
  background: #ccc;
  display: flex;
  text-align: center;
  line-height: 12vw;
  justify-content: space-around;
}
header .index-header-left {
  width: 20%;
}
header .index-header-right {
  width: 20%;
}
header .index-header-main {
  width: 60%;
}
